Claude Smith worked on the earlier ones, the more Disney like designs. Louis Schmitt and Irv Spence also did a bunch of model sheets. Michael Barrier mentioned in Hollywood Cartoons that these might have been the work of animator Walt Clinton.

I've always much preferred them designed this way compared to the way instructed at my school of doing a page of turn around, one of emotions, two of action. Not only do I feel my school's way is a drag but I usually find after a few sketches like these I'm more than ready to animate the character.